Buggy code:
public < T > List < T > query ( String sql , Object [ ] args , RowMapper < T > rowMapper ) throws DataAccessException { } public < T > T queryForObject ( String sql , Object [ ] args , int [ ] argTypes , RowMapper < T > rowMapper ) throws DataAccessException { } public < T > T queryForObject ( String sql , Object [ ] args , RowMapper < T > rowMapper ) throws DataAccessException { } public < T > T queryForObject ( String sql , Object [ ] args , int [ ] argTypes , Class < T > requiredType ) throws DataAccessException { } public < T > T queryForObject ( String sql , Object [ ] args , Class < T > requiredType ) throws DataAccessException { } public Map < String , Object > queryForMap ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public Map < String , Object > queryForMap ( String sql , Object [ ] args ) throws DataAccessException { } public long queryForLong ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public long queryForLong ( String sql , Object [ ] args ) throws DataAccessException { } public int queryForInt ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public int queryForInt ( String sql , Object [ ] args ) throws DataAccessException { } public < T > List < T > queryForList ( String sql , Object [ ] args , int [ ] argTypes , Class < T > elementType ) throws DataAccessException { } public < T > List < T > queryForList ( String sql , Object [ ] args , Class < T > elementType ) throws DataAccessException { } public List < Map < String , Object > > queryForList ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public List < Map < String , Object > > queryForList ( String sql , Object [ ] args ) throws DataAccessException { } public SqlRowSet queryForRowSet ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public SqlRowSet queryForRowSet ( String sql , Object [ ] args ) throws DataAccessException { } protected int update ( final PreparedStatementCreator psc , final PreparedStatementSetter pss ) throws DataAccessException { } public int update ( PreparedStatementCreator psc ) throws DataAccessException { } public int update ( final PreparedStatementCreator psc , final KeyHolder generatedKeyHolder ) throws DataAccessException { } public int update ( String sql , PreparedStatementSetter pss ) throws DataAccessException { } public int update ( String sql , Object [ ] args , int [ ] argTypes ) throws DataAccessException { } public int update ( String sql , Object [ ] args ) throws DataAccessException { } public int [ ] batchUpdate ( String sql , final BatchPreparedStatementSetter pss ) throws DataAccessException { } public < T > T execute ( CallableStatementCreator csc , CallableStatementCallback < T > action ) throws DataAccessException { } public < T > T execute ( String callString , CallableStatementCallback < T > action ) throws DataAccessException { } public Map < String , Object > call ( CallableStatementCreator csc , List < SqlParameter > declaredParameters ) throws DataAccessException { } protected Map < String , Object > extractReturnedResults ( CallableStatement cs , List updateCountParameters , List resultSetParameters , int updateCount ) throws SQLException { } protected Map < String , Object > extractOutputParameters ( CallableStatement cs , List < SqlParameter > parameters ) throws SQLException { } @ SuppressWarnings ( "unchecked" ) protected Map < String , Object > processResultSet ( ResultSet rs , ResultSetSupportingSqlParameter param ) throws SQLException { } protected RowMapper < Map < String , Object > > getColumnMapRowMapper ( ) { } protected < T > RowMapper < T > getSingleColumnRowMapper ( Class < T > requiredType ) { } @ SuppressWarnings ( "unchecked" ) protected Map < String , Object > createResultsMap ( ) { } protected void applyStatementSettings ( Statement stmt ) throws SQLException { } protected void handleWarnings ( Statement stmt ) throws SQLException { } protected void handleWarnings ( SQLWarning warning ) throws SQLWarningException { } private static String getSql ( Object sqlProvider ) { } private class CloseSuppressingInvocationHandler implements InvocationHandler { private final Connection target ; public CloseSuppressingInvocationHandler ( Connection target ) { } public Object invoke ( Object proxy , Method method , Object [ ] args ) throws Throwable { if ( method . getName ( ) . equals ( "getTargetConnection" ) ) { return this . target ; } else if ( method . getName ( ) . equals ( "equals" ) ) { <START_BUG> return proxy == ( args [ 0 ] ) ? Boolean . TRUE : Boolean . FALSE ; <END_BUG> } else if ( method . getName ( ) . equals ( "hashCode" ) ) { return System . identityHashCode ( proxy ) ; } else if ( method . getName ( ) . equals ( "close" ) ) { return null ; } try { Object retVal = method . invoke ( this . target , args ) ; if ( retVal instanceof Statement ) { applyStatementSettings ( ( ( Statement ) ( retVal ) ) ) ; } return retVal ; } catch ( InvocationTargetException ex ) { throw ex . getTargetException ( ) ; } } } private static class SimplePreparedStatementCreator implements PreparedStatementCreator , SqlProvider { private final String sql ; public SimplePreparedStatementCreator ( String sql ) { } public PreparedStatement createPreparedStatement ( Connection con ) throws SQLException { } public String getSql ( ) { } } private static class SimpleCallableStatementCreator implements CallableStatementCreator , SqlProvider { private final String callString ;

Fix:
return proxy == ( args [ 0 ] ) ;